Apparatus for treating water for steam boilers



LA VERGNE T. BRYSON 1,861,785

APPARATUS FOR TREATING WATER FOR STEAM BOILERS Filed July 26, 1928 ZflSh'eQtSfSheet 1 June 7,1932.

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APPARATUS FOR TREATING WATER FOR STEAM BOILERS Filed July 26, 1928 2 Sheets-Sheet 2 Patented June 7, 1932 UNITED STATES PATENT OFFICE LA V'E RGNE THOKAS BBYSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO DEARBORN CHEMI- CAL COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS AI'IPABATUS FOR TREATING WATER NR STEAM BOILERS Application filed July 26, 1928, Serial No. 295,582, and in British India August 18, 1927.

This invention relates to improvements in apparatus for treating water for steam boilers and it consists of the matters hereinafter described and more particularly pointed out in the appended claim.

The primary object of the invention is to provide simple and eflicient means for feeding chemical solutionto boiler water supply conduits such as railway water columns, hydrants and the like for the purpose of treating the water before it is introduced into the boiler, to prevent or reduce scale, corrosion, foaming and priming in the boiler.

Another object of the invention is to provide a means of this kind which is operable by a part of the water in the supply conduit, to deliver to the water before it enters the boiler, the proper amount of chemical solution necessary to render it fit for boiler purposes.

Still another object of the invention is to provide such a means especially adapted for use in connection with wayside water columns of railways and which means may be disposed either within or without the column and which is automatically operated for its intended purpose each time water is fed from the column to a locomotive steam boiler.

Iii the drawings Fig. 1 is a view in side elevation of a railway water column to which one form of the invention has been applied for feeding chem ical into the water therein, parts of the column being shown as broken away to more clearly disclose the construction thereof.

Fig. 2 is a vertical sectional view on an enlarged scale of the means associated with the column for feeding chemical solution to the water passing up through the column.

Fig. 3 is a view in side elevation of adifferent type of water column with my improved chemical feeding means on the outside thereof. v

Fig. 4 is a detail view of a portion of a 'end of this fitting is threaded an inlet. pipe water column with a further modified form of the invention embodied therein.

Referring now in detail to that embodiment of the invention illustrated in Figs. 1 and 2 of the accompanying drawings, 1 indicates as a whole the upright tapering tubular body of a railway water column, which is connected in any suitable manner at its bottom end with a source of water supply such as a wayside tank or main. The top end of said column terminates in' a radial flange 2 upon which bears a horizontally disposed discharge spout 3 with a downturned discharged end 4. The discharge spout is so connected to the top end of the column as to permit it to beswung from a position parallel with a railroad track to a position at aright angle thereto which will bring the end 4 into position to discharge water into a locomotive tender (not shown). As shown herein, there is an axially disposed shaft 5 in said column for actuating the column valve for shutting off or turning on the water therefor and this shaft projects up through the discharge spout where it is gear connected to a horizontal shaft 6 on the discharge spout so as to be operated from the discharge end of the spout. Such a structure may be taken as typical of one well known type of water column with which one form of my invention is employed.

Within the column and preferably nearer the bottom than the top, I provide an aspirator or jet pump indicated as a whole at 7 and which includes a T fitting 8. Into the bottom 9 the bottom end of which may have a flaring bell shaped mouth 10 to better direct a part of the u award flowing stream of water in the column 1nto said T fitting which has within the same an upwardly tapering nozzle 11. Into the top end of said fitting is screwed a tail or discharge pipe 12 the top discharge end of which is made sinuous as at 13 for a purpose later to appear. Opening laterally into the said T fitting is a pipe 14 which also to extends through the adjacent wall portion of this column and is connected by a check valve 15 to an upright pipe 16. In said pipe 16 is a T fitting 17 and a short branch or pipe 18 opens laterally at one end into said fitting and at its other end into an upright tank 19 containing the chemical solution desired to be introduced into the water in said column. In the pipe 16 above-and below the fitting 17 are shut off valves 21 and 22 respectively. The bottom end of the pipe 16 is connected to a suitable source of water under pressure and when it is desired to fill the tank with water to form the desired chemical solution, the valve 21 is first closed and the valve 22 then opened. However with the tank loaded with chemical solution the valve 22 is closed and the valve 21 is opened.

Assume now that it is desired to water a locomotive z-The spout would be swung into position above the tender and the shaft 6 would then be actuated to open the valve of the water column for the passage of water therethrough. As the water is rushing up through the column a part of the same will enter the bell mouth end of the pipe 9 to pass through the nozzle with a et action and thus produce a velocity to create a vacuous condition in the chamber of the T fitting 8 about so the nozzle. This will draw chemical solution from the tank up through the pipes 16 and 14 to the chamber in said fitting to then be drawn into the stream of water entering the tail pipe. As the mixture of chemical solution reaches the sinuous part 13 of the tail piece it is caused to more intimately mix and it is then discharged into the main stream in the column. So soon as the flow of water in the column ceases, the device ceases operation. When the water is thus shut off in the column, its level of course stands at about that indicated at 23 in Fig. 1, which is considerably above the level of the solution in the tank as indicated at 24. However even 5 under such condition the unbalanced head can produce no back flow into the tank because of the check valve 15 before mentioned. The

quantity of chemical solution thus admitted to the column may be readily controlled by the valve 21 as is apparent.

In Fig. 3 is shown a different form of column and the aspirating device or jet pump is located on the outside thereof. In said Figure 1 indicates thecolumn and 3 indicates the swingable discharge spout. 5 indicates the control valve for the column with one leg 6 opening into one side of the column near its bottom end. The jet pump or aspirating device which as before mentioned is 9 disposed outside the column comprise a T fitting 8 the same as that beforedescribed and connected to the bottom end thereof is the top end of a pipe 9 which is curved to enter the column at a point approximately level with the top of the valve casing leg 6. Connected to the lateral leg of said fitting is a horizontal pipe 14 which in turn is connected by a check valve 15 to the top end of an upright pipe 16. In this last-mentioned pipe is a fitting l'i' by which it is connected to the chemical solution tank 19 by a short horizontal branch pipe 18 and in saidpipe 16 above and below said fitting are shut off valves 21 and 22 respectively. The bottom end of said pipe 16 may be connected up in any suitable manner to a source of water suppl to fill the tank 19 when necessary to provlde the desired amount of chemical solution.

To the top end of the T fitting 8 is connccted one end of a pipe 12 having a sinuous intermediate part 13 and the top end of said pipe is bent to form a gooseneck 23 to discharge axially of the column into a funnel like mouth 24 on one end of a conduit 25 car,- ried by the swingable discharge spout 3 of the column. The other end of said conduit is arranged to discharge downwardly into the stream of water issuing from said discharge spout to mix therewith. With such a construction when the column valve 5" is opened, water wi 11 enter the column through the valve leg 6 and will pass upwardly therein to the discharge spout. A part of this water as it enters the column will enter the pipe end 10 in the opposite wall of the column to pass up through the aspirator device into the tail pi 12 drawing chemical solution from the tin into the tail pipe when a mixture of chemical solution and water isdelivered into the pipe 25 to be discharged into the stream issum ing from the down turned end of the .dischafige spout of the column to be mixed therewit In Fig. 4 is shown an alternative form of aspirating device formed by fitting a ring 26 within the column 1 which ring has a restricted opening therein. A pipe 9" leading from a chemical solution tank, enters the column just above this ring and as water passes through this ring its velocity is increased and 1] a suction is produced about said restriction thus causing a flow of chemical solution through the pipe 9 into the column to there mix with the stream of water therein. Preferably the wall of the restricted opening in 11 the ring is defined by a gradually tapering surface to reduce as much as possible any loss in the available head of water.

The chemical solution feed is operative onl upon establishing a flow of water in the co umn and the quantity of chemical solution thus fed is readily controllable.

While in describing my invention I have referred in detail to the form and arrangement of the various parts thereof, the same is to be considered as illustrative only.

I claim as my invention In combination with an uprigl railway water column having a swingab e dischar spout, a fluid chemical tank adjacent the co 1i umn, a conduit having one end in communication with the interior of said column, means providing a nozzle chamber in said conduit, a pipe opening at an end into said chamber and having a check valve therein, a branch pipe connecting said tank with said first mentioned pipe, and shut oflz' valves in said pipe, one on each side said branch pipe, the other end of said conduit being arranged in a manner to discharge into water discharged by the said spout.

In testimony whereof, I have hereunto set my hand, this 10th da of July 1928.

LA VERGNE TdoMAs l3RYSON. 

